Question

A puck of mass 80.0 g and radius 3.90 cmslides along an air table
at a speed of 1.50 m/s as shown in thefigure below. It makes a
glancing collision with a second puck ofradius 6.00 cm and mass
140.0 g (initiallyat rest) such that their rims just touch. Because
their rims arecoated with instant-acting glue, the pucks stick
together and spinafter the collision.

(a) What is the angular momentum of the
systemrelative to the center of mass?kg·m2/s